Type hint improvements

[chayim]

This PR contains a series of type hint improvements. While it still doesn't complete coverage, we've at least moved the ball forward a bit

[codecov-commenter]

Codecov Report

Patch coverage: 99.42% and no project coverage change.

Comparison is base (ded9f7c) 91.37% compared to head (c080909) 91.37%.
Report is 2 commits behind head on master.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2952   +/-   ##
=======================================
  Coverage   91.37%   91.37%           
=======================================
  Files         126      126           
  Lines       32603    32608    +5     
=======================================
+ Hits        29790    29796    +6     
+ Misses       2813     2812    -1     

Files Changed	Coverage Δ
redis/_parsers/base.py	90.83% <ø> (ø)
redis/_parsers/resp3.py	47.55% <0.00%> (ø)
redis/asyncio/connection.py	83.92% <ø> (+0.33%)	⬆️
redis/cluster.py	92.81% <ø> (ø)
redis/commands/json/commands.py	89.55% <ø> (ø)
redis/commands/search/__init__.py	72.41% <ø> (ø)
redis/commands/search/field.py	98.64% <ø> (ø)
tests/test_asyncio/test_cwe_404.py	100.00% <ø> (ø)
tests/test_asyncio/test_json.py	99.78% <ø> (ø)
tests/test_asyncio/test_lock.py	99.48% <ø> (ø)
... and 23 more

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